Create a desktop entry ~/.config/autostart/mailspring.desktop
[Desktop Entry] Name=Mailspring Type=Applicaton Exec=mailspring --background
Or add a new entry to Session and startup list
Create a desktop entry ~/.config/autostart/mailspring.desktop
[Desktop Entry] Name=Mailspring Type=Applicaton Exec=mailspring --background
Or add a new entry to Session and startup list
[Desktop Entry] Name=Screensaver Type=Applicaton Exec=xscreensaver -nosplash
xscreensaver-command -lock